Pencil



Nav. 22,' 1927.

v c. F.DOEBLER PENCIL Filed March 11. 1921 INVENTOR c /ll Patented Nov. 22, 1927.

UNITED STAT PATENT OFFICE.

CHARLES F. DOEBLER, OF AUSTINVTEXAS, ASSIGNOR TO :PERFECT POINTPENCIL CGRIORATION, OE NEW YORK, N. Y., A CORPORATON OEIJELAWARE.

v PENCIL. I

application mea March 11,v 1921. seriaiNo. 451,467.'

This invention relates to pencils. More specically it relates to pencils of the type in which the crayon may be fed york forced from the body of the pencil.v f

A- type of pencil, now well known, coinprises a barrel provided with a member having a bore in which a lead is kfrictionally held. In this type of pencil thelead may be forced from the pencil by causing longitudinal movement of a rod or other follower. Friction between the side walls of the bore and the lead is relied on, to prevent the latter fromV dropping from the pencil. If a lead employed in refilling such a4 pencil vis smaller in diameteithan that for which the lead-receiving bore is designed the'lead slips down from time to time which is extremely annoying and leads vto breakageof the lead. Furthermore, even when leads of uniform diameter are employed, the use of such a pencil is practically limited to comparatively hard leads. If a soft lead' or crayon, (such as indelible cra-yon) is employed it becomes so worn in the normal feeding operation that before any considerable amount has been consumed the abovereferred to ob jectionable slipping begins.

@ne of they principal objects of the present invention is to vovercome the above inentioned objections; i. e., to providea pencil of the type indicated in which av softlead, `o r a lead considerably under-size, ory a colored crayon such vas an indelible crayon may be employed without objectionable slipping. .Y f Another object is to provide a pencil which is simple inV construction in view of the functions performed. Otherfob'jects and advantages will vbecome apparent asv theA invention is hereinafter disclosed. f

Referring` to the drawings. Which illus-` tratewhat I now consider a preferred form of my invention: l

Figure l is anelevation partly in sec-v tion of my improved pencil.

Fig. 2 is a top plan view of the same.

Fig. 3 is a section oii the line 3 3 .of Fierl. i i

`Fig'. tais a fragmentary detail elevation `showing ya form of means for readily determining the .amountof lead or other 'f crayon in the Vlower .portio'nvof the pencil; The pencil Villustrated comprisesa-barrel or outei'- casing 1 provided with tipf2 screw-threadedlyj or otherwise detachably secured thereto. VThe said tip is ,provided witha bore shown internally threaded at itsl upper portion, tapering or c0nvergingat`its intermediate portion and terminating in a -.reduced portion of large enough "diameter 'to 'permit passage' therethrough of the largest diameter lead. intended to be' employed in 4the pencil. YA sleeve or guide tube 3internallyfbored .to a diameter at least equal -to the diameter of the largest lead .to

1be employed, vis provided witlra tapering endt, the apexangle of vwliichis preferably 4slightly Vgreater'fthanthat of the tapering bore in the tip 2. The saidmeniber 3 lis'eX- 'ternally threadedv at 5to zooperate with the internal threads of the said tipi-2. Thev with one or morelongitudinal slits 7 as clearly shown in' Fig. 3. f By virtue of the structure thus'faryde scribed a lead or crayon 6 iiiountedin'l the' pencil attimes when no feed istaking place tliefrictional pressure maybe increased by the following operation.

The tip 2 together Vwi h yits sleeve. or tube l tapering endl of the member 3 is provided f 3 may be removedfby. u'nscrewing tlie'former from the barrel 1. f The member 3 may then .be adjusted towardfthe vtip 2 by relativev turning of these vmembers in the proper dif lf the, parts and 3 are movedv towards each other tliesomewhat resilient rection.

taperingend portionsof themeniber 3 will be forced or wedged inwardlyY to ergert a greater pressure on the crayon. 1 The parts should preferably be soadjusted vastoprevent the leadfrom dropping fronifthe pencil but nevertheless not so tight as-to impose too great impedance to feediiigof the lead as hereinafter described. 'A lock v.nut Sfor other suitable means may beprovided for 'holding the'parts Q-and 3 in'their adjusted position. Tlieeadjustinenthaving been Yeffected, -the tipf2 may again be screwedinto the barrel'.r Y

`substa'ntially as follows: follower rod for y 'l The '-feedingmeehaaism which i prefer., i at present, tofeinploymaybe. constructed ber 3.

' 11 is provided with an opening through which the rodrl() is freely movable in an axial or longitudinal direction. A nut 16, internally threaded to co-operate with the screw-threaded portion of the follower rod, is secured to and within a sleeve rotatable in and with respect to the casing 1. Means are provided for constraining the said sleeve15 against longitudinal displacement with respect to the barrel 1. Thus the `said sleeve seats or abuts at its lower end against the block 11 and the laterally eX- tending lugs 17 which are secured to said *sleeve 15 seat against a cap member 18 scre threaded or otherwise detachably secured to Athe casing 1. It will be noted that upper end ofthe sleeve 15 projects from the casing 1 Vand may readily be gripped and rotated by the user. The said upper end may be provided with an eraser 19 if desired.

Assuming that the parts are in the position shown in Fig. 1 and it is desired to feed the lead 6 from the pencil, the operator will grasp the projecting end of the sleeve 15 and rotate the same in a clockwise direction with relation to the casing 1. This actuation of the sleeve 15 causes rotation of the nut 16 and consequent longitudinal movement of therod 9 Vto force the Alead from the pencil to an extent depending on the extent of rotation of said sleeve. To refill the pencil it is' only necessary to rotate the sleeve 15 in the reverse direction to retract the rod 9 and the lead may be inserted in the members 2 andi 3 in a manner now obvious.

The pencil illustrated is also provided withr means whereby the user may readily determine the length of lead in the tip portion of the pencil at ,any time. A shoulder or lug 2O is provided on the follower rod in such a position as to engage the block 11 when a full length crayon 6 isin the tip. The vcap 18 is provided with apertures 21 (see Figs.1 and 2) through which the lugs 17 may passwhen said lugs and apertures are in registry. By causing such registration the user may pull out the sleeve 15 together with' its rod 9 `(without removing the cap 18) until the shoulderv 2O engages Vthe block 11. :It willbe appreciated that the extent'to which the sleeve 15 may be withdrawn in this manner will be equalto the length of lead or crayon which has been consumedfand knowing the normal lengthv O a fullsize lead theoperator will be apprised of the length of lead still available. If desired the sleeve 15 may be provided with calibrations or indicia, to be read with the top of the cap 18 as a reference line, so as to indicate in inches, or other suitable units, the'length of crayon in the tip of the pencil. It` will be noted that while the lugs 17 are passing'the apertures 21 during feeding operation there may be a slight tendency of the sleeve 15 to move out of the barrel. This may readily be avoided by exerting a. slight downward pressure on the sleeve 15 while it is being actuated. `When the feeding has been accomplished the lugs 17 will be, or may readily be brought, out of registry with the apertures 21and the parts Will then lbe locked against inadvertent displacement.

The operation and Vimportant advantages of my improved pencil will now be apparent to those skilled in the art. I kwish also to call attention to the storagel spaces and 26 either or both of which may be employed as a magazine for eXtra crayons.

I claim:

.1. In a. pencil of thesclass described, in

movement thus allowed the follower gives an indication ofthe amount of lead remaining in the pencil. Y

2. In a pencil of therclass described, in combination, acasing provided with means `slidably to receive a crayon, a follower within said 'casing for forcing said crayon from the casing, la head member on said casing, means comprising 'a .part actuatable from the exterior of said casing for imparting a feed n'ioveinent to said follower on rotation inev 'of said lpart in one direction and lfor retracting said follower past said head. memberand j Y without retracting the crayon on longitudinal movement of said part Laway from said casing. Y f

3. In a pencil of the class described, in combination, a casing provided with a crayon-receiving Vtip portion, a follower within said Vcasing for forcing said crayon`V from saidv casing, a: head member on said casing, asie-eve normally within said casing and normally surrounding the upper end of said follower, means constraining said fol-V lower against rotation 'but permitting".lo-ngi-'` tudinal'movement thereof with l respect to vsaid casing, and interengaging means between saidifollonf'er and sleeve whereby longitudinal movement may be imparted to said follower either by rotation of said extend, said tip khaving' a tapering yinternal bore, an internally bored member screwthreadedly engaglng said tipandhavmg a split tapering end adapted to extend vvintothe tapering bore `of tip, said membery being movable with respect `to said ,casingY and means comprising a follower-rod for forcing a crayon Vthrough said member..

- A5. A pencily of the class described comprising in combination, a casing Aprovided `with a tip through which ajcrayon is adapt- .ed :to extend, said tip having atapering internal bore, an internally bored'l member screw-threadedly engaging said tip'and having a split tapering end adapted to rextend into the tapering bore of said tip, means for locking said tip and member `against inadvertent relative displacement, and means Y. y

combination, a. casing provided with means slidably kto receive a crayon, a follower withcomprising a follower-rod for "forcing a .crayon through said member. f f

. 6. A pencil of the class described, comprising, in combination, a casing provided with a. tip through which a crayon is adapted to extend, cooperating screw threads on said casing and `tip whereby said'tip may be moved toward and awayV from said casing, said tipV having a tapering internalY bore, an internally bored member screwfthreadedly engaging saidl tip yand having a split end adapted to'extend into the taperingborei of said tip, and means comprising a follower-v rod for forcing a crayonthroughsaid member. y 7. A pencil of the class described, Vcomprising, in combination, ahollow casing *vpro-v vided with screw threads, a tip through which a crayon is adapted to extend and having screw-threads adapted to cooperate with said first named screw'threa'ds to connect said tip and casing, said tip having a tapering internal bore, an internally bored member carried by said tip and having a split end adapted to extend into the tapering bore of said tip, said tip and member being relatively movable in a longitudinal direction, and means comprising a follower-rod for forcing a crayon through said member.

Y8.' The invention defined inJV claim in which mea-ns areprovided for locking said tip and members against inadvertent relayive displacement.

9. In a pencil rotatable in the body,means in the body Y holder, the combination' with a tubular body, of a partY at therear thereof providing a shoulder, a nut member orliiaigd ofthe nut member forconiin ing the nu-t memberbetween said means and the shoulder, said.v nut member extending through .said part, alcap' ydetachably secured to' said nut member and positioned externally of the body, .a jhead vel ement detachably secured' to `the -front end of the body, ahlead ofthe bodyl for. manually rotatingthe nut element, aS-head element detachablysecured to the body, andproviding-a lead",conduitV anda push rod on the feedscrewengaging in said lead conduit. Y

vll. The invention defined in .claim [7 kin .which meansl are provided for locking said' tip Vand ymember againstinadvertent relative 'displacement 'f f f .12.111 `a pencil of the class described,`i`n

in said casingfor-forcing said lcrayon from the casing, means.V comprising a part actuable from the exterior offsaid casing for -imparting a feed movement .to said followeronI rotation ofsaid part in one .direction and for retractin-g `said Yfollower Vvon longitudinal movement of said part away from said. casing, and means whereby the extenty oflongi- `tudinal movement of said part. depends upon the length .ofcrayon in the tip of the pencil.

13.1711 a pencilyof theclass described, in combination, aj casing providedV with a crayon-receiving xtip portion, :a follower within` said casing for forcing said crayon frpnisaid casing, la sleeve normally within ksaid casing. and. normally surrounding'fthe upper end ofjsaid follower, means constraining said follower against rotation'but permitting longitudinal movementthereof with `respect to said casing, interengaging means between said follower and sleeve whereby longitudinal movement may be imparted to said follower either by rotation of said sleeve or by longitudinal movement of the latter, and means wherebyY the extent of longitudinal movement of Vsaid sleeve depends upon* the length of crayon in the tip of the pencil.

f v14. A pencil comprising in combination, a i

casing havingav removable tip, a sleeve whichextends at its opposite endsL into said casing and: tip respectively when the pencil is assembled, said sleeve being removable .-tlnough the tipfendof saidcasing when said tip is removedfrom the casing and being movable'with respect toV said tip,l aV crayon gz l1,650,116

slidably mounted in the bore of said sleeve and frictionally engageable with the wall thereof, and means comprising a followerrod for forcing the crayon through said sleeve.

15. A pencil comprising the combination set forth in claim 2 and provided with means for limiting the retract-ing inovenientof the follower with respect to the casino'.

15, A pencil comprising the combination set forth in claim 3 and provided with means for limiting the longitudinal movement of said follower in the direction toward the head of the casing.

17. A pencil comprising the combination set forth in claim 1li and provided with meansfor adjusting the friction between the crayon and the wall of the sleeve by relative rotation of the sleeve and tip.

v18. In a pencil of the class described, the combination with a casing adapted to slidably receive a crayon, of a follower within said casing for forcingl said crayon therefrom, a head member on said casing, means comprising a part actuatable fromthe eXterior of said casing for imparting` a feed movement to said follower on rotation of said part in one direction and for retracting said follower by an outward longitudinal movement of said part upon said part being' turned to a predetermined position relatively to said head member, said longitudinal movement being prevented for other positions of said part.

19. In a pencil of the class described, the

combination with -a casing adapted to slidv ably receive a crayon, of a follower within said casing for forcing; said crayon therefrom, a head on said casing, means comprising a part actuatable from the exterior of said casing for imparting a feed movement to said follower on rotation of said part in one direction and for retractinp,- said follower on an outward longitudinal movement of said part, a registrable element on said part and a corresponding registrable element on said head,-and means for preventing said longitudinal movement except when said regis-j trable elements are in registry. c I

20. In a pencil of the class described, the combination with a casing provided with means slidably to receive a crayon, of a follower within said casing` for forcing` said crayon therefrom, a head member on said casing, means comprising a part projecting,` outwardly from saidY head member for imparting` a feed movement to said follower on rotation of said part in` one direction and tween said follower and sleeve whereby longitudinal movement may be imparted to said follower either by rotation of said sleeve or by longitudinal movement of the latter without retracting the crayon. y Y

22. In a pencil of the class described, the combination with a 'casing provided with means slidably to receivea crayon, of affollower within said casing'for forcing said crayon therefrom, a detachable head on said casing, means comprising` a part actuatable' `from the exterior of said casing for impart-V ing a feed movement to said follower on ro' tation of said part in one direction andV for retracting said follower on .longitudinal movement of said part away from said casing, without retracting the crayon and'without detaching' said detachable head. y i Y' In testimony whereof I-hereto affix my signature.' y

' CHARLES F. DOEBLER. 

